fix(discover-quick-context): Added react query logic, updated tests, … (getsentry#40965)

1. Used react-query and moved query logic down to individual context
level.
2. Caching should work for individual and multi-rows.
3. Added tests. 
4. Changed heading for Suspect commits.

//NOTE: Will add a quick commit to switch to our own useQuery
implementation.

Co-authored-by: Abdullah Khan <[email protected]>

Author: Abdkhan14